Slide-disk calculator.



J. A. SCHEIBLI.

SLIDE DISK CALCULATOR,

` APPLICATION FILED 0012.8. 1912. 1,075,1 24. Patented oct. 7', 1913.

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JIN .ADLPH YSGIHEIBLI, -O 'WEST NEW YORK, NEW JERSEY.

stimmten" oaneonmoa.,

Spcification 0f Ltts Tawlit.

fP-atenteaoet. 7,1913.

Application'ld October 8, 1912. Serial No. 734,614.

poses, since on account of the'laek of space in the short distance fromthe beginning to the end of the rule, a line and legible divi-V sion isimpossible. Circular computing rules of a diameter of the length ofthose'lengest rectilinear computing rules are, on the contrary, not onlyvery easily handled, but,on account of their 3.14 longer peripheralIneas'- urement, make possible a graduation more exact to that veryextent. In contrast to the circular, the rectilinear vcomputing rulesalso have the disadvantage that, according to the size of the result tobe read, a second displacement of the'rule in one direction or the otheris necessary when computing, so that the result will notpass beyond thescale.

IWith the circular computing'rulesthis disadvantage is done-away with,since here a continuous scale can be employed. The cir,- cular computingrules on the other hand' having only two gradually adjacent edges arelimited to'fewer possibilities of computing with direct reading oftheresults than the rectilinear rule, while the rectilinear computingrules have the advantage of being so arran-geable that by employing twopairs of mutually'movable edges provided with graduations, and by oneadjustment of the rule, the result of two computing processes, `forinstance, the product of three numbers, can be arrived at.

Thepurpcse of the presentinvention is to combine the advantages of therectilinear and the circular rules. The simple transfer of therectilinear arrangement to the circular form would not result in a handyconstruction or one operating ina manner permanently free fromobjection, since the rule would have to be constructed circular and beexactly fitted inside as well as outside. This disadvantage would bepresent especially in the Alar-ger lcomputing rules which are reouiredin the large majority of cases, since they are absolutely necessary forcomputation of comparatively precise exactness.

In Ithe slide disk calculator according to the present invention, thegraduations are placed on Ysup'erposed disks, the upper of which, atleast, is transparent.`

-A device embodying the .invention is shown, by way of example, intheaccompanyin g drawing, fin which;-

Figure '-1 shows-a side elevationlof the deviee;-Fig.v2,aplan Viewthereof, and Fig. 3

shows a. partial vertical section on a larger scale.

A- pair of graduations, 1an inner and an outergraduation GQGZ, is'placedupon the transparentdiskp. This disk-isfastened to the crown gwhich-provided with the covering ring 1 also serves as a handle torotate the disk Between the disk p and the ring g is anot- 1er vdisk clwhich is attached to the ring e. Upon the disk al are-placed outer andinner graduations, G3 and G4, which in the present-case are alike andone of which is adjacent to the inner and the other totheoutersgraduation of the disk p. All these logarithmic graduat-ions as isapparent from Fig. .2, run continuously in the same way around thecircumference, but the inner graduation upon disk p, is directedoppositely to the others. The hub e carryingthe rin-ge and in-turn thedisk Z is rotatable upon the axis a of the stand a. The stand can beattached to a desk, not shown, rotatable about a horizontal axis. A handwheel j" serves to rotate the disk d, which wheel is t-he ring e. Bya'nut 7L. with counter nut z' the ring g is pressed against the handwheel 'ring The latter is pressed against the ring g which yin its turnispressed against the ring e. The disk-supporting ring y is thereforeclamped between the disk-supportingring @and the hand wheehring rEhepressure can beregulated by adjusting the nuts h, c'. The result of thislarrangement is that, upon rotating the hand wheel f', in addition tothe disk d, the crown rj and the disk 2') are carried along by friction,in case the two latter parts are not-prevented from rotating by holdingfast the crown. And

vice versa, upon rotation of the crown q, in addition to the disk p, thedisk ai is also rotated by friction in case the handv wheel f is notheld fast.

In order to make possible the most exact reading, the indicator orrunner m is not attached above the disks p and Z but between them. Theindicator is fastened to a ring l, which is pressed against the ring eby the ring lc and hence through friction participates in the rotationof the disk d. After removal of the central nut c screwed onto axis aand of cover plate b, the friction between ring Z and ring e can beadjusted by means of the screws fastening ring lo to ring e. In orderthat the indicator may be rotated independently, an arm 0 is fastened toring Z above the indicator, the end of which arm is provided with ahandle 0. At the graduations the indicator m and the arm 0 are given acircular form and in the ring of the indicator is attached, forinstance, a thread n. formed of a tine metal wire or a hair-line uponr atransparent plate.

To carry out a computation, commencement is made either by rotating handwheel f while holding fast crown q', or by rotating crown Q whileholding fast hand wheel f,- or by simultaneous moving of both parts.lVhen crown g is left free, both disks are moved together by rotation onhand wheel f. The movement of the disks can also be effected, of course,by rotation of .the crown g. In this way the slide disk calculator canbe brought into such a position that the result will be directly infront of the person computing so that it will not be necessary for thecomputor to change his position, although the result of the compiuta--tion is to be read, without rotation of the entire slide diskcalculator, at a point lying opposite the person making the computation.O

Instead of the graduations specially shown, graduations formed in adifferent manner may also be employed for different kinds ofcomputations.

The graduation arrangement shown on the drawing can also be repeated, sothat several pairs of graduations are arranged on one disk, adjacent towhich are graduations arranged on the inside and outside of the otherdisk. Additional graduations can also be arranged on one disk which arenot adjacent to the graduations on the other disk. rlhe numbers on thesegraduations may be read o by employing the indicator.

It is understood that the word disk as used herein refers to therelatively movable parts of a calculator whether it be disk shaped ornot. l

I claim as my invention: 1 In a slide disk calculator, the combinationof a pair of superposed graduated disks; a rotatable crown connected. toone novara@c of the disks; and a hand wheel connected to and remote fromthe other disk.

2. In a slide disk calculator, the combination of a pair of superposedgraduated disks; a continuous rotatable crown secured to one disk; and acontinuous hand wheel secured to the other disk and in a dilferent planetherefrom.

3. In a slide disk calculator, the conbination of a pair of superposedgraduated disks; a continuous rotatable crown secured to one disk; and acontinuous hand wheel secured to the other disk and in a different planetherefrom, said crown and wheel being separated a considerable distancefrom each other.

4. In a slide disk calculator, the combination of a pair of superposedgraduated disks; a continuous rotatable crown secured to one disk; and acontinuous hand wheel secured to and remote from the other disk, saidcrown and disk being disposed in widely separate parallel planes.

5. In a slide disk calculator, the combination of a stand; a pair ofrings both rotatable on said stand; a pair of disks carried by the ringsrespectively; a crown connected to one disk; and a hand-wheel connectedto the ring on which the other disk is carried.

6. In a slide disk calculator, the combination of a support; a pair ofco-axial disks rotatably mounted on said sulpport; an indicatorrevolubly mounted on the support co-axially between said disks andspaced from both of them; and means holding said disks and indicator inspaced relation and yieldably connecting the disks, the indicator andthe support. 1

7. In a slide disk calculator, 'the combination of a support; arotatable disk having frictional engagement with the support; a secondrotatable disk out of contact with the support and having frictionalengagement with the first disk; and a revolving indicator havingfrictional engagement with the irstdisk and out of Contact with thesupport.

8. In a slide disk calculator, the combination of a support; a rotatabledisk mounted on said support; a second rotatable disk out of contactwith the support and having frictional engagement with the first disk;and a revolving indicator associated with the disks.

9. In a slide disk calculator, the combination of a support; a rotatabledisk mounted on said support; a second rotatable disk out of contactwith the support and having vfrictional engagement with the first disk;and a revolving indicator associated with the disks and havingfrictional engagement with one of the disks.

l0. In a slide disk calculator, the combination of a support; arotatable disk having noviem adjusting the friction between theindicator and the first disk.

11. In a slide disk calculator, the-combi.

nation of a support; a rotatable disk mounted on said support; a secondrotatable disk out of contact with the support and having frictionalengagement with thev first disk; a revolving indicator associated withthe disks; and means for adjusting the friction between the disks.

12. In a slide disk calculator, the combination of a support; arotatable disk mounted on said support; av second rotatable disk out ofcontact with the support and having frictional engagement with the iirstdisk; a revolving indicator associated with the disks and havinfrictional engagement with one of the dis s; and means for adjusting thefriction between the indicator and said one` of the disks.

13. In a slide disk calculator, the combination of a support; arotatable disk having frictional engagement with the support; a secondrotatable disk out of contact with the sup ort and having frictionalengage-l ment with the first disk; a revolving indicator havingfrictional engagement withthe first disk and out of cont-act with thesupport; Aand means for adjusting the engagement between the first diskand the support.

14. In a slide disk calculator, the combination of a pair of disks; anindicator therebetween; means for supporting the indicator and holdingit out of contactwith the disks; and separate means for rotating thefirst named means.

15.' In a slide disk calculator,"the combination of a pairof super oseddisks relatively concentrically rot-ata le, one of which has a centralopening; a support concentrically rotatable relative to said disks; anindicator between the disks secured to said support; and a strong arm'secured to said support and disposed above the to disk.

16. In a slide disk calculator, t e combination of a support; a pair ofdisks rotatably mounted thereon; an indicator between the disks; a ringsupporting the indicator and holding it out of contact with the disks; astrong arm secured to the ring; and a nonrotatable top `plate disposedhigher than the disks and carried by said support.

' 17. In a slide disk calculator, the combination of a pair of disks anda ring rotatable about a common axis; a manipulating arm secured to saidring and havinga handle;

horizontal plane different from :horizont-al Y ynation of an upper disk;a lower disk be- .neatii the upper disk; an arm above the upper disk; anindicator between the disks;

and a member connecting the arm and indi-` cator.

19. In a slide ldisk calculator, the combination of an upper disk havinga central opening; a, lower disk beneath the upper disk; an arm abovethe upper disk; an indicator between the disks; and a member disposed insaid. opening and connecting the arm and indicator.

20. In a slide disk calculator, the combination of an upper disk havinga central opening therein; a lower disk beneath the upper disk; a ringin said opening; an indicator between said disks and secured to thering; and an arm above the upper disk and secured to the ring, saiddisks and ring being rotatable about a common axis.

21. In a slide disk calculator, the combination of an upper disk; alower disk; a ring late below the lower disk and supporting t e upperdisk; a manipulating wheel below the ring plate and connected to thelower disk; an indicator between the disks; and an arm connected to theindicator and disposed above the upper disk, said disks, plate, wheel,indicator and arm being rotatable about a common axis.

22. In a slide disk calculator, the combination of an upper disk; alower disk; a ring plate below the lower disk and supporting the upperdisk; a manipulating wheel below the ring plate and connected to thelower disk; an indicator between the disks; an arm connected to theindicator; and a supporting member around the axis of which said disks,plate, wheel indicator and arm rotate.

23. In a slide disk calculator, the combination of a supporting shaft;a'hub rotatably mounted thereon; a. lower disk mounted on the hub; aring plate rotatably mountnation of a supporting shaft; a hub rota tablymounted thereon; a lower disk carried by the hub; a ring late rotatablymounted on the hub below the lower disk and provided with a peripheralcrown; an upper and an indicator secured to said ring in a plate mountedon. said crown, above the is@ lower diei: and having e @entrai opening',)in testimony whereof, have signed my e ring rotatably mounted Withinsaid open- 11eme to this specication in the presence of mg; en indicatorcarried thereon between twosubseribm Wltnesses.

the disks; a manipulating arm .mouned on JOH ADGLPH SCHEIBLI. 5 the diskabove the upper disk; and a 'mw Witnesses:

nipuiating ring below the lower ring Piate FRANK H. LOGAN,

and connected to the hub. ALFRED R. ANDERSON.,

